高指数晶面结构贵金属纳米颗粒超晶格的模板辅助自组装与光学性能

Nanoparticle superlattices with high-index planes have periodic roughness, high-density low coordination nanoparticles and chiral kinked nanoparticles on their surfaces, and have potential applications in surface-enhanced Raman scattering (SERS), catalysis and chiral optical device etc. The project propose to prepare monodispersed noble metallic Au, Ag, Au-Ag core shell and Ag/Au alloy nanoparticles with controllable size and nanocrystallinity, also Co nanopartciles with controllable size and crystal structure by the liquid-phase synthesis method. Noble metallic nanoparticle superlattices with high-index planes are controllably constructed by the template-assisted self-assembly process and the effects of SERS on their surfaces are studied. The nanoparticle superlattices are optimized and selected, which show excellent Raman enhancement effects to biomedical, pharmaceutical, pesticide and explosives molecules. The current research will further facilitate the applications of the nanoparticle superlattices in catalysis, functional device, optoelectronic, and biosensing.

高指数晶面结构纳米颗粒超晶格的表面具有周期性的粗糙度、高浓度的低配位纳米颗粒以及手性扭结状纳米颗粒，在表面增强拉曼散射光谱、催化和手性光学器件等方面具有潜在的应用价值。本项目拟通过液相合成的方法制备单分散的尺寸和结晶度可控的贵金属金、银、金-银核壳和银/金合金纳米颗粒，以及尺寸和晶型可控的钴纳米颗粒。通过模板辅助的自组装过程可控构筑高指数晶面结构的贵金属纳米颗粒超晶格并研究其表面增强拉曼散射光谱效应。优化遴选出对生物医学、医药、农药和爆炸物分子具有优良拉曼增强效果的高指数晶面结构的贵金属纳米颗粒超晶格。本项研究将进一步促进纳米颗粒超晶格在催化、功能器件、光电子和生物传感器领域内的应用。

高指数晶面结构纳米颗粒超晶格的表面具有周期性的粗糙度、高浓度的低配位纳米颗粒以及手性扭结状纳米颗粒，在表面增强拉曼散射(SERS)、催化和手性光学器件等方面具有潜在的应用价值。本项目通过液相法合成了尺寸可控的单分散贵金属纳米颗粒，利用模板辅助的自组装方法构筑了高指数晶面结构的贵金属纳米颗粒超晶格。与低指数晶面结构的Au纳米颗粒超晶格相比，高指数晶面结构的Au纳米颗粒超晶格表现出了更好的SERS效应。此外，利用Au纳米颗粒的增强荧光效应，提高了稀土发光基团的发光强度和荧光效率。本项目研究的开展将进一步促进贵金属纳米材料在催化、功能器件、光电子和生物传感器领域内的应用。